I had ordered 2 units from UK. 1 for me and 1 for my friend. The Unit I gave to my friend is working fine on ArchLinux and everything from SSH is working fine on that.

Can it be hardware problem? If yes can I use any WiFi adapters over USB?

I haven't tried the deep freeze method few suggested (keeping the Pi in fridge for couple of hours seem to make USB / Ethernet work for some folks) but I don't want to do it as it may damage the board.

3 Answers
3

By the way, it's easy to setup USB WiFi: plug in a compatible adapter, check if you see it as "wlan0" in ifconfig -a output (with HWaddr etc), modify 'wlan0' section in /etc/network/interfaces (assuming you're using WPA/WPA2 password-protected network with DHCP), then reboot: